XVII th World Congress of the International Commission of Agricultural and Biosystems Engineering (CIGR) COMPARISON OF MECHANICAL PROPERTIES OF TWO APPLE VARIETIES UNDER COMPRESSION LOADING CSBE100603 -Presented at Section VI: Postharvest Technology and P

ABSTRACT In this study strength properties of two Iranian apple varieties (Golab Kohanz and Shafi Abadi), under compression loading, were considered and compared using standard methods. The properties such as rupture force and energy, failure stress and strain, Young's modulus, toughness and hardness were determined in 86% and 84% moisture content (w.b) for Golab Kohanz and Shafi Abadi, respectively. Mechanical properties of apples were evaluated using 20 cylindrical specimens of each variety, taken in horizontal and vertical direction by Universal Testing Machine. Average values of rupture force and energy, failure stress, failure strain, Young's modulus, toughness and hardness were determined, 57.82 N, 285.88 mJ, 0.37 MPa, 31.26%, 0.93 MPa, 0.07 J/cm3 and 9.14 N/mm for Shafi Abadi variety, respectively. The corresponding values for Golab Kohanz were obtained as 51.11 N. 157.51 mJ, 0.32 MPa, 23.36%, 0.81 MPa, 0.04 J/cm3 and 7.79 N/mm respectively. According to results, effect of the sampling orientation was not significant on the mechanical properties in any two varieties